1 /* 2 * Support for Compaq iPAQ H3100 and H3600 handheld computers (common code) 3 * 4 * Copyright (c) 2000,1 Compaq Computer Corporation. (Author: Jamey Hicks) 5 * Copyright (c) 2009 Dmitry Artamonow <mad_soft@inbox.ru> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/gpio.h> 15 #include <linux/gpio_keys.h> 16 #include <linux/input.h> 17 #include <linux/mfd/htc-egpio.h> 18 #include <linux/mtd/mtd.h> 19 #include <linux/mtd/partitions.h> 20 #include <linux/platform_device.h> 21 #include <linux/serial_core.h> 22 23 #include <asm/mach/flash.h> 24 #include <asm/mach/map.h> 25 #include <asm/mach/serial_sa1100.h> 26 27 #include <mach/h3xxx.h> 28 29 #include "generic.h" 30 31 void h3xxx_init_gpio(struct gpio_default_state *s, size_t n) 32 { 33 while (n--) { 34 const char *name = s->name; 35 int err; 36 37 if (!name) 38 name = "[init]"; 39 err = gpio_request(s->gpio, name); 40 if (err) { 41 printk(KERN_ERR "gpio%u: unable to request: %d\n", 42 s->gpio, err); 43 continue; 44 } 45 if (s->mode >= 0) { 46 err = gpio_direction_output(s->gpio, s->mode); 47 } else { 48 err = gpio_direction_input(s->gpio); 49 } 50 if (err) { 51 printk(KERN_ERR "gpio%u: unable to set direction: %d\n", 52 s->gpio, err); 53 continue; 54 } 55 if (!s->name) 56 gpio_free(s->gpio); 57 s++; 58 } 59 } 60 61 62 /* 63 * H3xxx flash support 64 */ 65 static struct mtd_partition h3xxx_partitions[] = { 66 { 67 .name = "H3XXX boot firmware", 68 .size = 0x00040000, 69 .offset = 0, 70 .mask_flags = MTD_WRITEABLE, /* force read-only */ 71 }, { 72 .name = "H3XXX rootfs", 73 .size = MTDPART_SIZ_FULL, 74 .offset = 0x00040000, 75 } 76 }; 77 78 static void h3xxx_set_vpp(int vpp) 79 { 80 gpio_set_value(H3XXX_EGPIO_VPP_ON, vpp); 81 } 82 83 static int h3xxx_flash_init(void) 84 { 85 int err = gpio_request(H3XXX_EGPIO_VPP_ON, "Flash Vpp"); 86 if (err) { 87 pr_err("%s: can't request H3XXX_EGPIO_VPP_ON\n", __func__); 88 return err; 89 } 90 91 err = gpio_direction_output(H3XXX_EGPIO_VPP_ON, 0); 92 if (err) 93 gpio_free(H3XXX_EGPIO_VPP_ON); 94 95 return err; 96 } 97 98 static void h3xxx_flash_exit(void) 99 { 100 gpio_free(H3XXX_EGPIO_VPP_ON); 101 } 102 103 static struct flash_platform_data h3xxx_flash_data = { 104 .map_name = "cfi_probe", 105 .set_vpp = h3xxx_set_vpp, 106 .init = h3xxx_flash_init, 107 .exit = h3xxx_flash_exit, 108 .parts = h3xxx_partitions, 109 .nr_parts = ARRAY_SIZE(h3xxx_partitions), 110 }; 111 112 static struct resource h3xxx_flash_resource = 113 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M); 114 115 116 /* 117 * H3xxx uart support 118 */ 119 static void h3xxx_uart_set_mctrl(struct uart_port *port, u_int mctrl) 120 { 121 if (port->mapbase == _Ser3UTCR0) { 122 gpio_set_value(H3XXX_GPIO_COM_RTS, !(mctrl & TIOCM_RTS)); 123 } 124 } 125 126 static u_int h3xxx_uart_get_mctrl(struct uart_port *port) 127 { 128 u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 129 130 if (port->mapbase == _Ser3UTCR0) { 131 /* 132 * DCD and CTS bits are inverted in GPLR by RS232 transceiver 133 */ 134 if (gpio_get_value(H3XXX_GPIO_COM_DCD)) 135 ret &= ~TIOCM_CD; 136 if (gpio_get_value(H3XXX_GPIO_COM_CTS)) 137 ret &= ~TIOCM_CTS; 138 } 139 140 return ret; 141 } 142 143 static void h3xxx_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 144 { 145 if (port->mapbase == _Ser3UTCR0) { 146 if (!gpio_request(H3XXX_EGPIO_RS232_ON, "RS232 transceiver")) { 147 gpio_direction_output(H3XXX_EGPIO_RS232_ON, !state); 148 gpio_free(H3XXX_EGPIO_RS232_ON); 149 } else { 150 pr_err("%s: can't request H3XXX_EGPIO_RS232_ON\n", 151 __func__); 152 } 153 } 154 } 155 156 /* 157 * Enable/Disable wake up events for this serial port. 158 * Obviously, we only support this on the normal COM port. 159 */ 160 static int h3xxx_uart_set_wake(struct uart_port *port, u_int enable) 161 { 162 int err = -EINVAL; 163 164 if (port->mapbase == _Ser3UTCR0) { 165 if (enable) 166 PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */ 167 else 168 PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */ 169 err = 0; 170 } 171 return err; 172 } 173 174 static struct sa1100_port_fns h3xxx_port_fns __initdata = { 175 .set_mctrl = h3xxx_uart_set_mctrl, 176 .get_mctrl = h3xxx_uart_get_mctrl, 177 .pm = h3xxx_uart_pm, 178 .set_wake = h3xxx_uart_set_wake, 179 }; 180 181 /* 182 * EGPIO 183 */ 184 185 static struct resource egpio_resources[] = { 186 [0] = DEFINE_RES_MEM(H3600_EGPIO_PHYS, 0x4), 187 }; 188 189 static struct htc_egpio_chip egpio_chips[] = { 190 [0] = { 191 .reg_start = 0, 192 .gpio_base = H3XXX_EGPIO_BASE, 193 .num_gpios = 16, 194 .direction = HTC_EGPIO_OUTPUT, 195 .initial_values = 0x0080, /* H3XXX_EGPIO_RS232_ON */ 196 }, 197 }; 198 199 static struct htc_egpio_platform_data egpio_info = { 200 .reg_width = 16, 201 .bus_width = 16, 202 .chip = egpio_chips, 203 .num_chips = ARRAY_SIZE(egpio_chips), 204 }; 205 206 static struct platform_device h3xxx_egpio = { 207 .name = "htc-egpio", 208 .id = -1, 209 .resource = egpio_resources, 210 .num_resources = ARRAY_SIZE(egpio_resources), 211 .dev = { 212 .platform_data = &egpio_info, 213 }, 214 }; 215 216 /* 217 * GPIO keys 218 */ 219 220 static struct gpio_keys_button h3xxx_button_table[] = { 221 { 222 .code = KEY_POWER, 223 .gpio = H3XXX_GPIO_PWR_BUTTON, 224 .desc = "Power Button", 225 .active_low = 1, 226 .type = EV_KEY, 227 .wakeup = 1, 228 }, { 229 .code = KEY_ENTER, 230 .gpio = H3XXX_GPIO_ACTION_BUTTON, 231 .active_low = 1, 232 .desc = "Action button", 233 .type = EV_KEY, 234 .wakeup = 0, 235 }, 236 }; 237 238 static struct gpio_keys_platform_data h3xxx_keys_data = { 239 .buttons = h3xxx_button_table, 240 .nbuttons = ARRAY_SIZE(h3xxx_button_table), 241 }; 242 243 static struct platform_device h3xxx_keys = { 244 .name = "gpio-keys", 245 .id = -1, 246 .dev = { 247 .platform_data = &h3xxx_keys_data, 248 }, 249 }; 250 251 static struct platform_device *h3xxx_devices[] = { 252 &h3xxx_egpio, 253 &h3xxx_keys, 254 }; 255 256 void __init h3xxx_mach_init(void) 257 { 258 sa1100_register_uart_fns(&h3xxx_port_fns); 259 sa11x0_register_mtd(&h3xxx_flash_data, &h3xxx_flash_resource, 1); 260 platform_add_devices(h3xxx_devices, ARRAY_SIZE(h3xxx_devices)); 261 } 262 263 static struct map_desc h3600_io_desc[] __initdata = { 264 { /* static memory bank 2 CS#2 */ 265 .virtual = H3600_BANK_2_VIRT, 266 .pfn = __phys_to_pfn(SA1100_CS2_PHYS), 267 .length = 0x02800000, 268 .type = MT_DEVICE 269 }, { /* static memory bank 4 CS#4 */ 270 .virtual = H3600_BANK_4_VIRT, 271 .pfn = __phys_to_pfn(SA1100_CS4_PHYS), 272 .length = 0x00800000, 273 .type = MT_DEVICE 274 }, { /* EGPIO 0 CS#5 */ 275 .virtual = H3600_EGPIO_VIRT, 276 .pfn = __phys_to_pfn(H3600_EGPIO_PHYS), 277 .length = 0x01000000, 278 .type = MT_DEVICE 279 } 280 }; 281 282 /* 283 * Common map_io initialization 284 */ 285 286 void __init h3xxx_map_io(void) 287 { 288 sa1100_map_io(); 289 iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc)); 290 291 sa1100_register_uart(0, 3); /* Common serial port */ 292 // sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */ 293 294 /* Ensure those pins are outputs and driving low */ 295 PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM; 296 PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM); 297 298 /* Configure suspend conditions */ 299 PGSR = 0; 300 PCFR = PCFR_OPDE; 301 PSDR = 0; 302 303 GPCR = 0x0fffffff; /* All outputs are set low by default */ 304 GPDR = 0; /* Configure all GPIOs as input */ 305 } 306 307